Impement first testcase

tests/blabla.odin

@@ -1,8 +1,25 @@
 package tests
 
+import "core:os"
 import "core:testing"
 
+import "src:file"
+
 @(test)
-foo :: proc(t: ^testing.T) {
-	testing.expect(t, 1 + 1 == 2, "pass")
+single_tiny_file :: proc(t: ^testing.T) {
+	// Arrange
+
+	create_file(t, "single_tiny_file", "hello world!")
+
+	// Act
+
+	wd, err := os.get_working_directory(context.allocator)
+	entries, err2 := file.list_dir_recursive_by_path(TEST_DIR, wd)
+	pack(t, 750)
+	delete_path(t, "")
+	read := read(t, "single_tiny_file")
+
+	// Assert
+
+	testing.expect_value(t, read, "hello world!")
 }