hare

commit 995b64277541d29df3162b4521c2eae196ad8eb1
parent b6df30cf544f96796e536f65e70db9dfc73e7d5b
Author: Drew DeVault <sir@cmpwn.com>
Date:   Thu,  4 Feb 2021 14:39:02 -0500

bytes: add more test coverage

And fix a bug!

Diffstat:
M
bytes/copy.ha
 | 
7
+++++++
M
bytes/index.ha
 | 
16
++++++++++++++++
M
bytes/reverse.ha
 | 
15
+++++++++++++++

3 files changed, 38 insertions(+), 0 deletions(-)
diff --git a/bytes/copy.ha b/bytes/copy.ha
@@ -6,3 +6,10 @@ export fn copy(dest: []u8, src: []u8) void = {
 		dest[i] = src[i];
 	};
 };
+
+@test fn copy() void = {
+	let a: [4]u8 = [1u8, 3u8, 3u8, 7u8];
+	let b: [4]u8 = [0u8...];
+	copy(b[..], a[..]);
+	assert(equal(a, b));
+};
diff --git a/bytes/index.ha b/bytes/index.ha
@@ -7,3 +7,19 @@ export fn index(haystack: []u8, needle: u8) (size | void) = {
 		};
 	};
 };
+
+@test fn index() void = {
+	let a: [4]u8 = [1u8, 3u8, 3u8, 7u8];
+	match (index(a, 7u8)) {
+		n: size => assert(n == 3z),
+		void => abort(),
+	};
+	match (index(a, 42u8)) {
+		size => abort(),
+		void => void,
+	};
+	match (index([], 42u8)) {
+		size => abort(),
+		void => void,
+	};
+};
diff --git a/bytes/reverse.ha b/bytes/reverse.ha
@@ -1,5 +1,8 @@
 // Reverses a slice of bytes.
 export fn reverse(b: []u8) void = {
+	if (len(b) == 0z) {
+		return;
+	};
 	for (let s = 0z, e = len(b) - 1z; s < e) {
 		let x = b[s];
 		b[s] = b[e];
@@ -8,3 +11,15 @@ export fn reverse(b: []u8) void = {
 		e -= 1z;
 	};
 };
+
+@test fn reverse() void = {
+	let a: [4]u8 = [1u8, 3u8, 3u8, 7u8];
+	reverse(a);
+	assert(equal(a, [7u8, 3u8, 3u8, 1u8]));
+	let b: [5]u8 = [1u8, 2u8, 3u8, 4u8, 5u8];
+	reverse(b);
+	assert(equal(b, [5u8, 4u8, 3u8, 2u8, 1u8]));
+	let c: []u8 = [];
+	reverse(c);
+	assert(equal(c, []));
+};