std.debug.assert: remove special case for test builds

Previously, std.debug.assert would `@panic` in test builds,
if the assertion failed. Now, it's always `unreachable`.

This makes release mode test builds more accurately test
the actual code that will be run.

However this requires tests to call `std.testing.expect`
rather than `std.debug.assert` to make sure output is correct.

Here is the explanation of when to use either one, copied from
the assert doc comments:

Inside a test block, it is best to use the `std.testing` module
rather than assert, because assert may not detect a test failure
in ReleaseFast and ReleaseSafe mode. Outside of a test block, assert
is the correct function to use.

closes #1304

1 files changed, 19 insertions, 19 deletions

diff --git a/std/math/ceil.zig b/std/math/ceil.zig
index 8a5221d862..5c6b98b2ca 100644
--- a/std/math/ceil.zig
+++ b/std/math/ceil.zig
@@ -7,7 +7,7 @@
 const builtin = @import("builtin");
 const std = @import("../index.zig");
 const math = std.math;
-const assert = std.debug.assert;
+const expect = std.testing.expect;
 
 pub fn ceil(x: var) @typeOf(x) {
     const T = @typeOf(x);
@@ -81,34 +81,34 @@ fn ceil64(x: f64) f64 {
 }
 
 test "math.ceil" {
-    assert(ceil(f32(0.0)) == ceil32(0.0));
-    assert(ceil(f64(0.0)) == ceil64(0.0));
+    expect(ceil(f32(0.0)) == ceil32(0.0));
+    expect(ceil(f64(0.0)) == ceil64(0.0));
 }
 
 test "math.ceil32" {
-    assert(ceil32(1.3) == 2.0);
-    assert(ceil32(-1.3) == -1.0);
-    assert(ceil32(0.2) == 1.0);
+    expect(ceil32(1.3) == 2.0);
+    expect(ceil32(-1.3) == -1.0);
+    expect(ceil32(0.2) == 1.0);
 }
 
 test "math.ceil64" {
-    assert(ceil64(1.3) == 2.0);
-    assert(ceil64(-1.3) == -1.0);
-    assert(ceil64(0.2) == 1.0);
+    expect(ceil64(1.3) == 2.0);
+    expect(ceil64(-1.3) == -1.0);
+    expect(ceil64(0.2) == 1.0);
 }
 
 test "math.ceil32.special" {
-    assert(ceil32(0.0) == 0.0);
-    assert(ceil32(-0.0) == -0.0);
-    assert(math.isPositiveInf(ceil32(math.inf(f32))));
-    assert(math.isNegativeInf(ceil32(-math.inf(f32))));
-    assert(math.isNan(ceil32(math.nan(f32))));
+    expect(ceil32(0.0) == 0.0);
+    expect(ceil32(-0.0) == -0.0);
+    expect(math.isPositiveInf(ceil32(math.inf(f32))));
+    expect(math.isNegativeInf(ceil32(-math.inf(f32))));
+    expect(math.isNan(ceil32(math.nan(f32))));
 }
 
 test "math.ceil64.special" {
-    assert(ceil64(0.0) == 0.0);
-    assert(ceil64(-0.0) == -0.0);
-    assert(math.isPositiveInf(ceil64(math.inf(f64))));
-    assert(math.isNegativeInf(ceil64(-math.inf(f64))));
-    assert(math.isNan(ceil64(math.nan(f64))));
+    expect(ceil64(0.0) == 0.0);
+    expect(ceil64(-0.0) == -0.0);
+    expect(math.isPositiveInf(ceil64(math.inf(f64))));
+    expect(math.isNegativeInf(ceil64(-math.inf(f64))));
+    expect(math.isNan(ceil64(math.nan(f64))));
 }