virtualx-engine/tests/servers/test_text_server.h

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/*  test_text_server.h                                                   */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
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#ifndef TEST_TEXT_SERVER_H
#define TEST_TEXT_SERVER_H

#ifdef TOOLS_ENABLED

#include "editor/builtin_fonts.gen.h"
#include "servers/text_server.h"
#include "tests/test_macros.h"

namespace TestTextServer {

TEST_SUITE("[TextServer]") {
	TEST_CASE("[TextServer] Init, font loading and shaping") {
		SUBCASE("[TextServer] Loading fonts") {
			for (int i = 0; i < TextServerManager::get_singleton()->get_interface_count(); i++) {
				Ref<TextServer> ts = TextServerManager::get_singleton()->get_interface(i);
				TEST_FAIL_COND(ts.is_null(), "Invalid TS interface.");

				if (!ts->has_feature(TextServer::FEATURE_FONT_DYNAMIC)) {
					continue;
				}

				RID font = ts->create_font();
				ts->font_set_data_ptr(font, _font_NotoSans_Regular, _font_NotoSans_Regular_size);
				TEST_FAIL_COND(font == RID(), "Loading font failed.");
				ts->free_rid(font);
			}
		}

		SUBCASE("[TextServer] Text layout: Font fallback") {
			for (int i = 0; i < TextServerManager::get_singleton()->get_interface_count(); i++) {
				Ref<TextServer> ts = TextServerManager::get_singleton()->get_interface(i);
				TEST_FAIL_COND(ts.is_null(), "Invalid TS interface.");

				if (!ts->has_feature(TextServer::FEATURE_FONT_DYNAMIC) || !ts->has_feature(TextServer::FEATURE_SIMPLE_LAYOUT)) {
					continue;
				}

				RID font1 = ts->create_font();
				ts->font_set_data_ptr(font1, _font_NotoSans_Regular, _font_NotoSans_Regular_size);
				RID font2 = ts->create_font();
				ts->font_set_data_ptr(font2, _font_NotoSansThaiUI_Regular, _font_NotoSansThaiUI_Regular_size);

				Array font;
				font.push_back(font1);
				font.push_back(font2);

				String test = U"คนอ้วน khon uan ראה";
				//                 6^       17^

				RID ctx = ts->create_shaped_text();
				TEST_FAIL_COND(ctx == RID(), "Creating text buffer failed.");
				bool ok = ts->shaped_text_add_string(ctx, test, font, 16);
				TEST_FAIL_COND(!ok, "Adding text to the buffer failed.");

				const Glyph *glyphs = ts->shaped_text_get_glyphs(ctx);
				int gl_size = ts->shaped_text_get_glyph_count(ctx);
				TEST_FAIL_COND(gl_size == 0, "Shaping failed");
				for (int j = 0; j < gl_size; j++) {
					if (glyphs[j].start < 6) {
						TEST_FAIL_COND(glyphs[j].font_rid != font[1], "Incorrect font selected.");
					}
					if ((glyphs[j].start > 6) && (glyphs[j].start < 16)) {
						TEST_FAIL_COND(glyphs[j].font_rid != font[0], "Incorrect font selected.");
					}
					if (glyphs[j].start > 16) {
						TEST_FAIL_COND(glyphs[j].font_rid != RID(), "Incorrect font selected.");
						TEST_FAIL_COND(glyphs[j].index != test[glyphs[j].start], "Incorrect glyph index.");
					}
					TEST_FAIL_COND((glyphs[j].start < 0 || glyphs[j].end > test.length()), "Incorrect glyph range.");
					TEST_FAIL_COND(glyphs[j].font_size != 16, "Incorrect glyph font size.");
				}

				ts->free_rid(ctx);

				for (int j = 0; j < font.size(); j++) {
					ts->free_rid(font[j]);
				}
				font.clear();
			}
		}

		SUBCASE("[TextServer] Text layout: BiDi") {
			for (int i = 0; i < TextServerManager::get_singleton()->get_interface_count(); i++) {
				Ref<TextServer> ts = TextServerManager::get_singleton()->get_interface(i);
				TEST_FAIL_COND(ts.is_null(), "Invalid TS interface.");

				if (!ts->has_feature(TextServer::FEATURE_FONT_DYNAMIC) || !ts->has_feature(TextServer::FEATURE_BIDI_LAYOUT)) {
					continue;
				}

				RID font1 = ts->create_font();
				ts->font_set_data_ptr(font1, _font_NotoSans_Regular, _font_NotoSans_Regular_size);
				RID font2 = ts->create_font();
				ts->font_set_data_ptr(font2, _font_NotoNaskhArabicUI_Regular, _font_NotoNaskhArabicUI_Regular_size);

				Array font;
				font.push_back(font1);
				font.push_back(font2);

				String test = U"Arabic (اَلْعَرَبِيَّةُ, al-ʿarabiyyah)";
				//                    7^      26^

				RID ctx = ts->create_shaped_text();
				TEST_FAIL_COND(ctx == RID(), "Creating text buffer failed.");
				bool ok = ts->shaped_text_add_string(ctx, test, font, 16);
				TEST_FAIL_COND(!ok, "Adding text to the buffer failed.");

				const Glyph *glyphs = ts->shaped_text_get_glyphs(ctx);
				int gl_size = ts->shaped_text_get_glyph_count(ctx);
				TEST_FAIL_COND(gl_size == 0, "Shaping failed");
				for (int j = 0; j < gl_size; j++) {
					if (glyphs[j].count > 0) {
						if (glyphs[j].start < 7) {
							TEST_FAIL_COND(((glyphs[j].flags & TextServer::GRAPHEME_IS_RTL) == TextServer::GRAPHEME_IS_RTL), "Incorrect direction.");
						}
						if ((glyphs[j].start > 8) && (glyphs[j].start < 23)) {
							TEST_FAIL_COND(((glyphs[j].flags & TextServer::GRAPHEME_IS_RTL) != TextServer::GRAPHEME_IS_RTL), "Incorrect direction.");
						}
						if (glyphs[j].start > 26) {
							TEST_FAIL_COND(((glyphs[j].flags & TextServer::GRAPHEME_IS_RTL) == TextServer::GRAPHEME_IS_RTL), "Incorrect direction.");
						}
					}
				}

				ts->free_rid(ctx);

				for (int j = 0; j < font.size(); j++) {
					ts->free_rid(font[j]);
				}
				font.clear();
			}
		}

		SUBCASE("[TextServer] Text layout: Line break and align points") {
			for (int i = 0; i < TextServerManager::get_singleton()->get_interface_count(); i++) {
				Ref<TextServer> ts = TextServerManager::get_singleton()->get_interface(i);
				TEST_FAIL_COND(ts.is_null(), "Invalid TS interface.");

				if (!ts->has_feature(TextServer::FEATURE_FONT_DYNAMIC) || !ts->has_feature(TextServer::FEATURE_SIMPLE_LAYOUT)) {
					continue;
				}

				RID font1 = ts->create_font();
				ts->font_set_data_ptr(font1, _font_NotoSans_Regular, _font_NotoSans_Regular_size);
				RID font2 = ts->create_font();
				ts->font_set_data_ptr(font2, _font_NotoSansThaiUI_Regular, _font_NotoSansThaiUI_Regular_size);
				RID font3 = ts->create_font();
				ts->font_set_data_ptr(font3, _font_NotoNaskhArabicUI_Regular, _font_NotoNaskhArabicUI_Regular_size);

				Array font;
				font.push_back(font1);
				font.push_back(font2);
				font.push_back(font3);

				{
					String test = U"Test test long text long text\n";
					RID ctx = ts->create_shaped_text();
					TEST_FAIL_COND(ctx == RID(), "Creating text buffer failed.");
					bool ok = ts->shaped_text_add_string(ctx, test, font, 16);
					TEST_FAIL_COND(!ok, "Adding text to the buffer failed.");
					ts->shaped_text_update_breaks(ctx);
					ts->shaped_text_update_justification_ops(ctx);

					const Glyph *glyphs = ts->shaped_text_get_glyphs(ctx);
					int gl_size = ts->shaped_text_get_glyph_count(ctx);

					TEST_FAIL_COND(gl_size != 30, "Invalid glyph count.");
					for (int j = 0; j < gl_size; j++) {
						bool hard = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_HARD) == TextServer::GRAPHEME_IS_BREAK_HARD;
						bool soft = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_SOFT) == TextServer::GRAPHEME_IS_BREAK_SOFT;
						bool space = (glyphs[j].flags & TextServer::GRAPHEME_IS_SPACE) == TextServer::GRAPHEME_IS_SPACE;
						bool virt = (glyphs[j].flags & TextServer::GRAPHEME_IS_VIRTUAL) == TextServer::GRAPHEME_IS_VIRTUAL;
						bool elo = (glyphs[j].flags & TextServer::GRAPHEME_IS_ELONGATION) == TextServer::GRAPHEME_IS_ELONGATION;
						if (j == 4 || j == 9 || j == 14 || j == 19 || j == 24) {
							TEST_FAIL_COND((!soft || !space || hard || virt || elo), "Invalid glyph flags.");
						} else if (j == 29) {
							TEST_FAIL_COND((soft || !space || !hard || virt || elo), "Invalid glyph flags.");
						} else {
							TEST_FAIL_COND((soft || space || hard || virt || elo), "Invalid glyph flags.");
						}
					}
					ts->free_rid(ctx);
				}

				{
					String test = U"الحمـد";
					RID ctx = ts->create_shaped_text();
					TEST_FAIL_COND(ctx == RID(), "Creating text buffer failed.");
					bool ok = ts->shaped_text_add_string(ctx, test, font, 16);
					TEST_FAIL_COND(!ok, "Adding text to the buffer failed.");
					ts->shaped_text_update_breaks(ctx);

					const Glyph *glyphs = ts->shaped_text_get_glyphs(ctx);
					int gl_size = ts->shaped_text_get_glyph_count(ctx);
					TEST_FAIL_COND(gl_size != 6, "Invalid glyph count.");
					for (int j = 0; j < gl_size; j++) {
						bool hard = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_HARD) == TextServer::GRAPHEME_IS_BREAK_HARD;
						bool soft = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_SOFT) == TextServer::GRAPHEME_IS_BREAK_SOFT;
						bool space = (glyphs[j].flags & TextServer::GRAPHEME_IS_SPACE) == TextServer::GRAPHEME_IS_SPACE;
						bool virt = (glyphs[j].flags & TextServer::GRAPHEME_IS_VIRTUAL) == TextServer::GRAPHEME_IS_VIRTUAL;
						bool elo = (glyphs[j].flags & TextServer::GRAPHEME_IS_ELONGATION) == TextServer::GRAPHEME_IS_ELONGATION;
						TEST_FAIL_COND((soft || space || hard || virt || elo), "Invalid glyph flags.");
					}

					if (ts->has_feature(TextServer::FEATURE_KASHIDA_JUSTIFICATION)) {
						ts->shaped_text_update_justification_ops(ctx);

						glyphs = ts->shaped_text_get_glyphs(ctx);
						gl_size = ts->shaped_text_get_glyph_count(ctx);

						TEST_FAIL_COND(gl_size != 6, "Invalid glyph count.");
						for (int j = 0; j < gl_size; j++) {
							bool hard = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_HARD) == TextServer::GRAPHEME_IS_BREAK_HARD;
							bool soft = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_SOFT) == TextServer::GRAPHEME_IS_BREAK_SOFT;
							bool space = (glyphs[j].flags & TextServer::GRAPHEME_IS_SPACE) == TextServer::GRAPHEME_IS_SPACE;
							bool virt = (glyphs[j].flags & TextServer::GRAPHEME_IS_VIRTUAL) == TextServer::GRAPHEME_IS_VIRTUAL;
							bool elo = (glyphs[j].flags & TextServer::GRAPHEME_IS_ELONGATION) == TextServer::GRAPHEME_IS_ELONGATION;
							if (j == 1) {
								TEST_FAIL_COND((soft || space || hard || virt || !elo), "Invalid glyph flags.");
							} else {
								TEST_FAIL_COND((soft || space || hard || virt || elo), "Invalid glyph flags.");
							}
						}
					}
					ts->free_rid(ctx);
				}

				{
					String test = U"الحمـد الرياضي العربي";
					RID ctx = ts->create_shaped_text();
					TEST_FAIL_COND(ctx == RID(), "Creating text buffer failed.");
					bool ok = ts->shaped_text_add_string(ctx, test, font, 16);
					TEST_FAIL_COND(!ok, "Adding text to the buffer failed.");
					ts->shaped_text_update_breaks(ctx);

					const Glyph *glyphs = ts->shaped_text_get_glyphs(ctx);
					int gl_size = ts->shaped_text_get_glyph_count(ctx);

					TEST_FAIL_COND(gl_size != 21, "Invalid glyph count.");
					for (int j = 0; j < gl_size; j++) {
						bool hard = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_HARD) == TextServer::GRAPHEME_IS_BREAK_HARD;
						bool soft = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_SOFT) == TextServer::GRAPHEME_IS_BREAK_SOFT;
						bool space = (glyphs[j].flags & TextServer::GRAPHEME_IS_SPACE) == TextServer::GRAPHEME_IS_SPACE;
						bool virt = (glyphs[j].flags & TextServer::GRAPHEME_IS_VIRTUAL) == TextServer::GRAPHEME_IS_VIRTUAL;
						bool elo = (glyphs[j].flags & TextServer::GRAPHEME_IS_ELONGATION) == TextServer::GRAPHEME_IS_ELONGATION;
						if (j == 6 || j == 14) {
							TEST_FAIL_COND((!soft || !space || hard || virt || elo), "Invalid glyph flags.");
						} else {
							TEST_FAIL_COND((soft || space || hard || virt || elo), "Invalid glyph flags.");
						}
					}

					if (ts->has_feature(TextServer::FEATURE_KASHIDA_JUSTIFICATION)) {
						ts->shaped_text_update_justification_ops(ctx);

						glyphs = ts->shaped_text_get_glyphs(ctx);
						gl_size = ts->shaped_text_get_glyph_count(ctx);

						TEST_FAIL_COND(gl_size != 23, "Invalid glyph count.");
						for (int j = 0; j < gl_size; j++) {
							bool hard = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_HARD) == TextServer::GRAPHEME_IS_BREAK_HARD;
							bool soft = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_SOFT) == TextServer::GRAPHEME_IS_BREAK_SOFT;
							bool space = (glyphs[j].flags & TextServer::GRAPHEME_IS_SPACE) == TextServer::GRAPHEME_IS_SPACE;
							bool virt = (glyphs[j].flags & TextServer::GRAPHEME_IS_VIRTUAL) == TextServer::GRAPHEME_IS_VIRTUAL;
							bool elo = (glyphs[j].flags & TextServer::GRAPHEME_IS_ELONGATION) == TextServer::GRAPHEME_IS_ELONGATION;
							if (j == 7 || j == 16) {
								TEST_FAIL_COND((!soft || !space || hard || virt || elo), "Invalid glyph flags.");
							} else if (j == 3 || j == 9) {
								TEST_FAIL_COND((soft || space || hard || !virt || !elo), "Invalid glyph flags.");
							} else if (j == 18) {
								TEST_FAIL_COND((soft || space || hard || virt || !elo), "Invalid glyph flags.");
							} else {
								TEST_FAIL_COND((soft || space || hard || virt || elo), "Invalid glyph flags.");
							}
						}
					}

					ts->free_rid(ctx);
				}

				{
					String test = U"เป็น ภาษา ราชการ และ ภาษา";
					RID ctx = ts->create_shaped_text();
					TEST_FAIL_COND(ctx == RID(), "Creating text buffer failed.");
					bool ok = ts->shaped_text_add_string(ctx, test, font, 16);
					TEST_FAIL_COND(!ok, "Adding text to the buffer failed.");
					ts->shaped_text_update_breaks(ctx);
					ts->shaped_text_update_justification_ops(ctx);

					const Glyph *glyphs = ts->shaped_text_get_glyphs(ctx);
					int gl_size = ts->shaped_text_get_glyph_count(ctx);

					TEST_FAIL_COND(gl_size != 25, "Invalid glyph count.");
					for (int j = 0; j < gl_size; j++) {
						bool hard = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_HARD) == TextServer::GRAPHEME_IS_BREAK_HARD;
						bool soft = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_SOFT) == TextServer::GRAPHEME_IS_BREAK_SOFT;
						bool space = (glyphs[j].flags & TextServer::GRAPHEME_IS_SPACE) == TextServer::GRAPHEME_IS_SPACE;
						bool virt = (glyphs[j].flags & TextServer::GRAPHEME_IS_VIRTUAL) == TextServer::GRAPHEME_IS_VIRTUAL;
						bool elo = (glyphs[j].flags & TextServer::GRAPHEME_IS_ELONGATION) == TextServer::GRAPHEME_IS_ELONGATION;
						if (j == 4 || j == 9 || j == 16 || j == 20) {
							TEST_FAIL_COND((!soft || !space || hard || virt || elo), "Invalid glyph flags.");
						} else {
							TEST_FAIL_COND((soft || space || hard || virt || elo), "Invalid glyph flags.");
						}
					}
					ts->free_rid(ctx);
				}

				if (ts->has_feature(TextServer::FEATURE_BREAK_ITERATORS)) {
					String test = U"เป็นภาษาราชการและภาษา";
					RID ctx = ts->create_shaped_text();
					TEST_FAIL_COND(ctx == RID(), "Creating text buffer failed.");
					bool ok = ts->shaped_text_add_string(ctx, test, font, 16);
					TEST_FAIL_COND(!ok, "Adding text to the buffer failed.");
					ts->shaped_text_update_breaks(ctx);
					ts->shaped_text_update_justification_ops(ctx);

					const Glyph *glyphs = ts->shaped_text_get_glyphs(ctx);
					int gl_size = ts->shaped_text_get_glyph_count(ctx);

					TEST_FAIL_COND(gl_size != 25, "Invalid glyph count.");
					for (int j = 0; j < gl_size; j++) {
						bool hard = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_HARD) == TextServer::GRAPHEME_IS_BREAK_HARD;
						bool soft = (glyphs[j].flags & TextServer::GRAPHEME_IS_BREAK_SOFT) == TextServer::GRAPHEME_IS_BREAK_SOFT;
						bool space = (glyphs[j].flags & TextServer::GRAPHEME_IS_SPACE) == TextServer::GRAPHEME_IS_SPACE;
						bool virt = (glyphs[j].flags & TextServer::GRAPHEME_IS_VIRTUAL) == TextServer::GRAPHEME_IS_VIRTUAL;
						bool elo = (glyphs[j].flags & TextServer::GRAPHEME_IS_ELONGATION) == TextServer::GRAPHEME_IS_ELONGATION;
						if (j == 4 || j == 9 || j == 16 || j == 20) {
							TEST_FAIL_COND((!soft || !space || hard || !virt || elo), "Invalid glyph flags.");
						} else {
							TEST_FAIL_COND((soft || space || hard || virt || elo), "Invalid glyph flags.");
						}
					}
					ts->free_rid(ctx);
				}

				for (int j = 0; j < font.size(); j++) {
					ts->free_rid(font[j]);
				}
				font.clear();
			}
		}

		SUBCASE("[TextServer] Text layout: Line breaking") {
			for (int i = 0; i < TextServerManager::get_singleton()->get_interface_count(); i++) {
				Ref<TextServer> ts = TextServerManager::get_singleton()->get_interface(i);
				TEST_FAIL_COND(ts.is_null(), "Invalid TS interface.");

				if (!ts->has_feature(TextServer::FEATURE_FONT_DYNAMIC) || !ts->has_feature(TextServer::FEATURE_SIMPLE_LAYOUT)) {
					continue;
				}

				String test_1 = U"test test test";
				//                   5^  10^

				RID font1 = ts->create_font();
				ts->font_set_data_ptr(font1, _font_NotoSans_Regular, _font_NotoSans_Regular_size);
				RID font2 = ts->create_font();
				ts->font_set_data_ptr(font2, _font_NotoSansThaiUI_Regular, _font_NotoSansThaiUI_Regular_size);

				Array font;
				font.push_back(font1);
				font.push_back(font2);

				RID ctx = ts->create_shaped_text();
				TEST_FAIL_COND(ctx == RID(), "Creating text buffer failed.");
				bool ok = ts->shaped_text_add_string(ctx, test_1, font, 16);
				TEST_FAIL_COND(!ok, "Adding text to the buffer failed.");

				PackedInt32Array brks = ts->shaped_text_get_line_breaks(ctx, 1);
				TEST_FAIL_COND(brks.size() != 6, "Invalid line breaks number.");
				if (brks.size() == 6) {
					TEST_FAIL_COND(brks[0] != 0, "Invalid line break position.");
					TEST_FAIL_COND(brks[1] != 5, "Invalid line break position.");

					TEST_FAIL_COND(brks[2] != 5, "Invalid line break position.");
					TEST_FAIL_COND(brks[3] != 10, "Invalid line break position.");

					TEST_FAIL_COND(brks[4] != 10, "Invalid line break position.");
					TEST_FAIL_COND(brks[5] != 14, "Invalid line break position.");
				}

				ts->free_rid(ctx);

				for (int j = 0; j < font.size(); j++) {
					ts->free_rid(font[j]);
				}
				font.clear();
			}
		}

		SUBCASE("[TextServer] Text layout: Justification") {
			for (int i = 0; i < TextServerManager::get_singleton()->get_interface_count(); i++) {
				Ref<TextServer> ts = TextServerManager::get_singleton()->get_interface(i);
				TEST_FAIL_COND(ts.is_null(), "Invalid TS interface.");

				if (!ts->has_feature(TextServer::FEATURE_FONT_DYNAMIC) || !ts->has_feature(TextServer::FEATURE_SIMPLE_LAYOUT)) {
					continue;
				}

				RID font1 = ts->create_font();
				ts->font_set_data_ptr(font1, _font_NotoSans_Regular, _font_NotoSans_Regular_size);
				RID font2 = ts->create_font();
				ts->font_set_data_ptr(font2, _font_NotoNaskhArabicUI_Regular, _font_NotoNaskhArabicUI_Regular_size);

				Array font;
				font.push_back(font1);
				font.push_back(font2);

				String test_1 = U"الحمد";
				String test_2 = U"الحمد test";
				String test_3 = U"test test";
				//                    7^      26^

				RID ctx;
				bool ok;
				float width_old, width;
				if (ts->has_feature(TextServer::FEATURE_KASHIDA_JUSTIFICATION)) {
					ctx = ts->create_shaped_text();
					TEST_FAIL_COND(ctx == RID(), "Creating text buffer failed.");
					ok = ts->shaped_text_add_string(ctx, test_1, font, 16);
					TEST_FAIL_COND(!ok, "Adding text to the buffer failed.");

					width_old = ts->shaped_text_get_width(ctx);
					width = ts->shaped_text_fit_to_width(ctx, 100, TextServer::JUSTIFICATION_WORD_BOUND);
					TEST_FAIL_COND((width != width_old), "Invalid fill width.");
					width = ts->shaped_text_fit_to_width(ctx, 100, TextServer::JUSTIFICATION_WORD_BOUND | TextServer::JUSTIFICATION_KASHIDA);
					TEST_FAIL_COND((width <= width_old || width > 100), "Invalid fill width.");

					ts->free_rid(ctx);

					ctx = ts->create_shaped_text();
					TEST_FAIL_COND(ctx == RID(), "Creating text buffer failed.");
					ok = ts->shaped_text_add_string(ctx, test_2, font, 16);
					TEST_FAIL_COND(!ok, "Adding text to the buffer failed.");

					width_old = ts->shaped_text_get_width(ctx);
					width = ts->shaped_text_fit_to_width(ctx, 100, TextServer::JUSTIFICATION_WORD_BOUND);
					TEST_FAIL_COND((width <= width_old || width > 100), "Invalid fill width.");
					width = ts->shaped_text_fit_to_width(ctx, 100, TextServer::JUSTIFICATION_WORD_BOUND | TextServer::JUSTIFICATION_KASHIDA);
					TEST_FAIL_COND((width <= width_old || width > 100), "Invalid fill width.");

					ts->free_rid(ctx);
				}

				ctx = ts->create_shaped_text();
				TEST_FAIL_COND(ctx == RID(), "Creating text buffer failed.");
				ok = ts->shaped_text_add_string(ctx, test_3, font, 16);
				TEST_FAIL_COND(!ok, "Adding text to the buffer failed.");

				width_old = ts->shaped_text_get_width(ctx);
				width = ts->shaped_text_fit_to_width(ctx, 100, TextServer::JUSTIFICATION_WORD_BOUND);
				TEST_FAIL_COND((width <= width_old || width > 100), "Invalid fill width.");

				ts->free_rid(ctx);

				for (int j = 0; j < font.size(); j++) {
					ts->free_rid(font[j]);
				}
				font.clear();
			}
		}

		SUBCASE("[TextServer] Unicode identifiers") {
			for (int i = 0; i < TextServerManager::get_singleton()->get_interface_count(); i++) {
				Ref<TextServer> ts = TextServerManager::get_singleton()->get_interface(i);
				TEST_FAIL_COND(ts.is_null(), "Invalid TS interface.");

				static const char32_t *data[19] = { U"-30", U"100", U"10.1", U"10,1", U"1e2", U"1e-2", U"1e2e3", U"0xAB", U"AB", U"Test1", U"1Test", U"Test*1", U"test_testeT", U"test_tes teT", U"عَلَيْكُمْ", U"عَلَيْكُمْTest", U"ӒӖӚӜ", U"_test", U"ÂÃÄÅĀĂĄÇĆĈĊ" };
				static bool isid[19] = { false, false, false, false, false, false, false, false, true, true, false, false, true, false, true, true, true, true, true };
				for (int j = 0; j < 19; j++) {
					String s = String(data[j]);
					CHECK(ts->is_valid_identifier(s) == isid[j]);
				}

				if (ts->has_feature(TextServer::FEATURE_UNICODE_IDENTIFIERS)) {
					// Test UAX 3.2 ZW(N)J usage.
					CHECK(ts->is_valid_identifier(U"\u0646\u0627\u0645\u0647\u200C\u0627\u06CC"));
					CHECK(ts->is_valid_identifier(U"\u0D26\u0D43\u0D15\u0D4D\u200C\u0D38\u0D3E\u0D15\u0D4D\u0D37\u0D3F"));
					CHECK(ts->is_valid_identifier(U"\u0DC1\u0DCA\u200D\u0DBB\u0DD3"));
				}
			}
		}

		SUBCASE("[TextServer] Strip Diacritics") {
			for (int i = 0; i < TextServerManager::get_singleton()->get_interface_count(); i++) {
				Ref<TextServer> ts = TextServerManager::get_singleton()->get_interface(i);
				TEST_FAIL_COND(ts.is_null(), "Invalid TS interface.");

				if (ts->has_feature(TextServer::FEATURE_SHAPING)) {
					CHECK(ts->strip_diacritics(U"ٱلسَّلَامُ عَلَيْكُمْ") == U"ٱلسلام عليكم");
				}

				CHECK(ts->strip_diacritics(U"pêches épinards tomates fraises") == U"peches epinards tomates fraises");
				CHECK(ts->strip_diacritics(U"ΆΈΉΊΌΎΏΪΫϓϔ") == U"ΑΕΗΙΟΥΩΙΥΥΥ");
				CHECK(ts->strip_diacritics(U"άέήίΐϊΰϋόύώ") == U"αεηιιιυυουω");
				CHECK(ts->strip_diacritics(U"ЀЁЃ ЇЌЍӢӤЙ ЎӮӰӲ ӐӒӖӚӜӞ ӦӪ Ӭ Ӵ Ӹ") == U"ЕЕГ ІКИИИИ УУУУ ААЕӘЖЗ ОӨ Э Ч Ы");
				CHECK(ts->strip_diacritics(U"ѐёѓ їќѝӣӥй ўӯӱӳ ӑӓӗӛӝӟ ӧӫ ӭ ӵ ӹ") == U"еег ікииии уууу ааеәжз оө э ч ы");
				CHECK(ts->strip_diacritics(U"ÀÁÂÃÄÅĀĂĄÇĆĈĊČĎÈÉÊËĒĔĖĘĚĜĞĠĢĤÌÍÎÏĨĪĬĮİĴĶĹĻĽÑŃŅŇŊÒÓÔÕÖØŌŎŐƠŔŖŘŚŜŞŠŢŤÙÚÛÜŨŪŬŮŰŲƯŴÝŶŹŻŽ") == U"AAAAAAAAACCCCCDEEEEEEEEEGGGGHIIIIIIIIIJKLLLNNNNŊOOOOOØOOOORRRSSSSTTUUUUUUUUUUUWYYZZZ");
				CHECK(ts->strip_diacritics(U"àáâãäåāăąçćĉċčďèéêëēĕėęěĝğġģĥìíîïĩīĭįĵķĺļľñńņňŋòóôõöøōŏőơŕŗřśŝşšţťùúûüũūŭůűųưŵýÿŷźżž") == U"aaaaaaaaacccccdeeeeeeeeegggghiiiiiiiijklllnnnnŋoooooøoooorrrssssttuuuuuuuuuuuwyyyzzz");
				CHECK(ts->strip_diacritics(U"ǍǏȈǑǪǬȌȎȪȬȮȰǓǕǗǙǛȔȖǞǠǺȀȂȦǢǼǦǴǨǸȆȐȒȘȚȞȨ Ḁ ḂḄḆ Ḉ ḊḌḎḐḒ ḔḖḘḚḜ Ḟ Ḡ ḢḤḦḨḪ ḬḮ ḰḲḴ ḶḸḺḼ ḾṀṂ ṄṆṈṊ ṌṎṐṒ ṔṖ ṘṚṜṞ ṠṢṤṦṨ ṪṬṮṰ ṲṴṶṸṺ") == U"AIIOOOOOOOOOUUUUUUUAAAAAAÆÆGGKNERRSTHE A BBB C DDDDD EEEEE F G HHHHH II KKK LLLL MMM NNNN OOOO PP RRRR SSSSS TTTT UUUUU");
				CHECK(ts->strip_diacritics(U"ǎǐȉȋǒǫǭȍȏȫȭȯȱǔǖǘǚǜȕȗǟǡǻȁȃȧǣǽǧǵǩǹȇȑȓșțȟȩ ḁ ḃḅḇ ḉ ḋḍḏḑḓ ḟ ḡ ḭḯ ḱḳḵ ḷḹḻḽ ḿṁṃ ṅṇṉṋ ṍṏṑṓ ṗṕ ṙṛṝṟ ṡṣṥṧṩ ṫṭṯṱ ṳṵṷṹṻ") == U"aiiiooooooooouuuuuuuaaaaaaææggknerrsthe a bbb c ddddd f g ii kkk llll mmm nnnn oooo pp rrrr sssss tttt uuuuu");
				CHECK(ts->strip_diacritics(U"ṼṾ ẀẂẄẆẈ ẊẌ Ẏ ẐẒẔ") == U"VV WWWWW XX Y ZZZ");
				CHECK(ts->strip_diacritics(U"ṽṿ ẁẃẅẇẉ ẋẍ ẏ ẑẓẕ ẖ ẗẘẙẛ") == U"vv wwwww xx y zzz h twys");
			}
		}

		SUBCASE("[TextServer] Word break") {
			for (int i = 0; i < TextServerManager::get_singleton()->get_interface_count(); i++) {
				Ref<TextServer> ts = TextServerManager::get_singleton()->get_interface(i);

				if (!ts->has_feature(TextServer::FEATURE_SIMPLE_LAYOUT)) {
					continue;
				}

				TEST_FAIL_COND(ts.is_null(), "Invalid TS interface.");
				{
					String text1 = U"linguistically similar and effectively form";
					//                           14^     22^ 26^         38^
					PackedInt32Array breaks = ts->string_get_word_breaks(text1, "en");
					CHECK(breaks.size() == 4);
					if (breaks.size() == 4) {
						CHECK(breaks[0] == 14);
						CHECK(breaks[1] == 22);
						CHECK(breaks[2] == 26);
						CHECK(breaks[3] == 38);
					}
				}

				if (ts->has_feature(TextServer::FEATURE_BREAK_ITERATORS)) {
					String text2 = U"เป็นภาษาราชการและภาษาประจำชาติของประเทศไทย";
					//				 เป็น ภาษา ราชการ และ ภาษา ประจำ ชาติ ของ ประเทศไทย
					//                 3^   7^    13^ 16^  20^   25^ 29^ 32^

					PackedInt32Array breaks = ts->string_get_word_breaks(text2, "th");
					CHECK(breaks.size() == 8);
					if (breaks.size() == 8) {
						CHECK(breaks[0] == 3);
						CHECK(breaks[1] == 7);
						CHECK(breaks[2] == 13);
						CHECK(breaks[3] == 16);
						CHECK(breaks[4] == 20);
						CHECK(breaks[5] == 25);
						CHECK(breaks[6] == 29);
						CHECK(breaks[7] == 32);
					}
				}
			}
		}
	}
}
}; // namespace TestTextServer

#endif // TOOLS_ENABLED

#endif // TEST_TEXT_SERVER_H