1 files changed, 82 insertions, 0 deletions
diff --git a/test/text.c b/test/text.c
new file mode 100644
index 0000000..ec99890
--- /dev/null
+++ b/test/text.c
@@ -0,0 +1,82 @@
+#include "assert.h"
+#include "test.h"
+
+#include "text.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+
+void assert_line_equal(struct txt_line *line) {}
+
+void test_add_text() {
+  uint32_t lines_added, cols_added;
+  struct text *t = text_create(10);
+  const char *txt = "This is line 1\n";
+  text_append(t, 0, 0, (uint8_t *)txt, strlen(txt), &lines_added, &cols_added);
+  ASSERT(text_num_lines(t) == 2,
+         "Expected text to have two lines after insertion");
+
+  ASSERT(text_line_size(t, 0) == 14 && text_line_length(t, 0) == 14,
+         "Expected line 1 to have 14 chars and 14 bytes");
+  ASSERT_STR_EQ((const char *)text_get_line(t, 0).text, "This is line 1",
+                "Expected line 1 to be line 1");
+
+  const char *txt2 = "This is line 2\n";
+  text_append(t, 1, 0, (uint8_t *)txt2, strlen(txt2), &lines_added,
+              &cols_added);
+  ASSERT_STR_EQ((const char *)text_get_line(t, 1).text, "This is line 2",
+                "Expected line 2 to be line 2");
+}
+
+void test_delete_text() {
+  uint32_t lines_added, cols_added;
+  struct text *t = text_create(10);
+  const char *txt = "This is line 1";
+  text_append(t, 0, 0, (uint8_t *)txt, strlen(txt), &lines_added, &cols_added);
+
+  text_delete(t, 0, 12, 2);
+  ASSERT(text_line_length(t, 0) == 12,
+         "Expected line to be 12 chars after deleting two");
+  ASSERT(strncmp((const char *)text_get_line(t, 0).text, "This is line",
+                 text_line_size(t, 0)) == 0,
+         "Expected two chars to be deleted");
+
+  text_delete(t, 0, 0, 25);
+  ASSERT(text_get_line(t, 0).nbytes == 0,
+         "Expected line to be empty after many chars removed");
+
+  const char *txt2 = "This is line 1\nThis is line 2\nThis is line 3";
+  text_append(t, 0, 0, (uint8_t *)txt2, strlen(txt2), &lines_added,
+              &cols_added);
+  text_delete(t, 1, 11, 3);
+  ASSERT(text_line_length(t, 1) == 11,
+         "Expected line to contain 11 chars after deletion");
+  struct txt_line line = text_get_line(t, 1);
+  ASSERT(strncmp((const char *)line.text, "This is lin", line.nbytes) == 0,
+         "Expected deleted characters to be gone in the second line");
+
+  // test utf-8
+  struct text *t2 = text_create(10);
+  const char *txt3 = "Emojis: 🇫🇮 🐮\n";
+  text_append(t2, 0, 0, (uint8_t *)txt3, strlen(txt3), &lines_added,
+              &cols_added);
+
+  // TODO: Fix when graphemes are implemented, should be 11, right now it counts
+  // the two unicode code points 🇫 and 🇮 as two chars.
+  ASSERT(text_line_length(t2, 0) == 12,
+         "Line length should be 12 (even though there "
+         "are more bytes in the line).");
+
+  text_delete(t2, 0, 10, 2);
+  ASSERT(text_line_length(t2, 0) == 10,
+         "Line length should be 10 after deleting the cow emoji and a space");
+  struct txt_line line2 = text_get_line(t2, 0);
+  ASSERT(strncmp((const char *)line2.text, "Emojis: 🇫🇮", line2.nbytes) == 0,
+         "Expected cow emoji plus space to be deleted");
+}
+
+void run_text_tests() {
+  run_test(test_add_text);
+  run_test(test_delete_text);
+}