1 files changed, 164 insertions, 0 deletions
diff --git a/test/behavior/basic.zig b/test/behavior/basic.zig
new file mode 100644
index 0000000000..1372dfaeeb
--- /dev/null
+++ b/test/behavior/basic.zig
@@ -0,0 +1,164 @@
+const std = @import("std");
+const mem = std.mem;
+const expect = std.testing.expect;
+
+// normal comment
+
+/// this is a documentation comment
+/// doc comment line 2
+fn emptyFunctionWithComments() void {}
+
+test "empty function with comments" {
+    emptyFunctionWithComments();
+}
+
+test "truncate" {
+    try expect(testTruncate(0x10fd) == 0xfd);
+    comptime try expect(testTruncate(0x10fd) == 0xfd);
+}
+fn testTruncate(x: u32) u8 {
+    return @truncate(u8, x);
+}
+
+const g1: i32 = 1233 + 1;
+var g2: i32 = 0;
+
+test "global variables" {
+    try expect(g2 == 0);
+    g2 = g1;
+    try expect(g2 == 1234);
+}
+
+test "comptime keyword on expressions" {
+    const x: i32 = comptime x: {
+        break :x 1 + 2 + 3;
+    };
+    try expect(x == comptime 6);
+}
+
+test "type equality" {
+    try expect(*const u8 != *u8);
+}
+
+test "pointer dereferencing" {
+    var x = @as(i32, 3);
+    const y = &x;
+
+    y.* += 1;
+
+    try expect(x == 4);
+    try expect(y.* == 4);
+}
+
+test "const expression eval handling of variables" {
+    var x = true;
+    while (x) {
+        x = false;
+    }
+}
+
+test "character literals" {
+    try expect('\'' == single_quote);
+}
+const single_quote = '\'';
+
+test "non const ptr to aliased type" {
+    const int = i32;
+    try expect(?*int == ?*i32);
+}
+
+test "cold function" {
+    thisIsAColdFn();
+    comptime thisIsAColdFn();
+}
+
+fn thisIsAColdFn() void {
+    @setCold(true);
+}
+
+test "unicode escape in character literal" {
+    var a: u24 = '\u{01f4a9}';
+    try expect(a == 128169);
+}
+
+test "unicode character in character literal" {
+    try expect('💩' == 128169);
+}
+
+fn first4KeysOfHomeRow() []const u8 {
+    return "aoeu";
+}
+
+test "return string from function" {
+    try expect(mem.eql(u8, first4KeysOfHomeRow(), "aoeu"));
+}
+
+test "hex escape" {
+    try expect(mem.eql(u8, "\x68\x65\x6c\x6c\x6f", "hello"));
+}
+
+test "multiline string" {
+    const s1 =
+        \\one
+        \\two)
+        \\three
+    ;
+    const s2 = "one\ntwo)\nthree";
+    try expect(mem.eql(u8, s1, s2));
+}
+
+test "multiline string comments at start" {
+    const s1 =
+        //\\one
+        \\two)
+        \\three
+    ;
+    const s2 = "two)\nthree";
+    try expect(mem.eql(u8, s1, s2));
+}
+
+test "multiline string comments at end" {
+    const s1 =
+        \\one
+        \\two)
+        //\\three
+    ;
+    const s2 = "one\ntwo)";
+    try expect(mem.eql(u8, s1, s2));
+}
+
+test "multiline string comments in middle" {
+    const s1 =
+        \\one
+        //\\two)
+        \\three
+    ;
+    const s2 = "one\nthree";
+    try expect(mem.eql(u8, s1, s2));
+}
+
+test "multiline string comments at multiple places" {
+    const s1 =
+        \\one
+        //\\two
+        \\three
+        //\\four
+        \\five
+    ;
+    const s2 = "one\nthree\nfive";
+    try expect(mem.eql(u8, s1, s2));
+}
+
+test "call result of if else expression" {
+    try expect(mem.eql(u8, f2(true), "a"));
+    try expect(mem.eql(u8, f2(false), "b"));
+}
+fn f2(x: bool) []const u8 {
+    return (if (x) fA else fB)();
+}
+fn fA() []const u8 {
+    return "a";
+}
+fn fB() []const u8 {
+    return "b";
+}