expectEqualStrings
Function parameters
Parameters
- expected:[]const u8
- actual:[]const u8
Type definitions in this namespace
Types
- Reader
- A `std.Io.Reader` that writes a predetermined list of buffers during `stream`.
- ReaderIndirect
- A `std.Io.Reader` that gets its data from another `std.Io.Reader`, and always
This function is intended to be used only in tests.
Functions
- expectError
- This function is intended to be used only in tests.
- expectEqual
- This function is intended to be used only in tests.
- expectFmt
- This function is intended to be used only in tests.
- expectApproxEqAbs
- This function is intended to be used only in tests.
- expectApproxEqRel
- This function is intended to be used only in tests.
- expectEqualSlices
- This function is intended to be used only in tests.
- expectEqualSentinel
- This function is intended to be used only in tests.
- expect
- This function is intended to be used only in tests.
- expectEqualDeep
- This function is intended to be used only in tests.
- checkAllAllocationFailures
- Exhaustively check that allocation failures within `test_fn` are handled without
- refAllDecls
- Given a type, references all the declarations inside, so that the semantic analyzer sees them.
- refAllDeclsRecursive
- Given a type, recursively references all the declarations inside, so that the semantic analyzer sees them.
- fuzz
- Inline to avoid coverage instrumentation.
Provides deterministic randomness in unit tests.
Values
- random_seed
- Provides deterministic randomness in unit tests.
- failing_allocator
- = failing_allocator_instance.allocator()
- allocator
- This should only be used in temporary test programs.
- log_level
- TODO https://github.com/ziglang/zig/issues/5738
- backend_can_print
- = switch (builtin.zig_backend) { .stage2_aarch64, .stage2_powerpc, .stage2_riscv64, .stage2_spirv, => false, else => true, }
Source
Implementation
pub fn expectEqualStrings(expected: []const u8, actual: []const u8) !void {
if (std.mem.indexOfDiff(u8, actual, expected)) |diff_index| {
if (@inComptime()) {
@compileError(std.fmt.comptimePrint("\nexpected:\n{s}\nfound:\n{s}\ndifference starts at index {d}", .{
expected, actual, diff_index,
}));
}
print("\n====== expected this output: =========\n", .{});
printWithVisibleNewlines(expected);
print("\n======== instead found this: =========\n", .{});
printWithVisibleNewlines(actual);
print("\n======================================\n", .{});
var diff_line_number: usize = 1;
for (expected[0..diff_index]) |value| {
if (value == '\n') diff_line_number += 1;
}
print("First difference occurs on line {d}:\n", .{diff_line_number});
print("expected:\n", .{});
printIndicatorLine(expected, diff_index);
print("found:\n", .{});
printIndicatorLine(actual, diff_index);
return error.TestExpectedEqual;
}
}