delete test_artifacts directory when tests complete

 * add std.os.deleteTree
 * add std.os.deleteDir
 * add std.os.page_size
 * add std.os API for iterating over directories
 * refactor duplication in build.zig
 * update documentation on how to run tests

1 files changed, 13 insertions, 38 deletions

diff --git a/build.zig b/build.zig
index 918a629cf6..378ea66c86 100644
--- a/build.zig
+++ b/build.zig
@@ -5,44 +5,19 @@ pub fn build(b: &Builder) {
     const test_filter = b.option([]const u8, "test-filter", "Skip tests that do not match filter");
     const test_step = b.step("test", "Run all the tests");
 
-    const behavior_tests = b.step("test-behavior", "Run the behavior tests");
-    test_step.dependOn(behavior_tests);
-    for ([]bool{false, true}) |release| {
-        for ([]bool{false, true}) |link_libc| {
-            const these_tests = b.addTest("test/behavior.zig");
-            these_tests.setNamePrefix(b.fmt("behavior-{}-{} ",
-                if (release) "release" else "debug",
-                if (link_libc) "c" else "bare"));
-            these_tests.setFilter(test_filter);
-            these_tests.setRelease(release);
-            if (link_libc) {
-                these_tests.linkLibrary("c");
-            }
-            behavior_tests.dependOn(&these_tests.step);
-        }
-    }
+    const cleanup = b.addRemoveDirTree("test_artifacts");
+    test_step.dependOn(&cleanup.step);
 
-    const std_lib_tests = b.step("test-std", "Run the standard library tests");
-    test_step.dependOn(std_lib_tests);
-    for ([]bool{false, true}) |release| {
-        for ([]bool{false, true}) |link_libc| {
-            const these_tests = b.addTest("std/index.zig");
-            these_tests.setNamePrefix(b.fmt("std-{}-{} ",
-                if (release) "release" else "debug",
-                if (link_libc) "c" else "bare"));
-            these_tests.setFilter(test_filter);
-            these_tests.setRelease(release);
-            if (link_libc) {
-                these_tests.linkLibrary("c");
-            }
-            std_lib_tests.dependOn(&these_tests.step);
-        }
-    }
+    cleanup.step.dependOn(tests.addPkgTests(b, test_filter,
+        "test/behavior.zig", "behavior", "Run the behavior tests"));
 
-    test_step.dependOn(tests.addCompareOutputTests(b, test_filter));
-    test_step.dependOn(tests.addBuildExampleTests(b, test_filter));
-    test_step.dependOn(tests.addCompileErrorTests(b, test_filter));
-    test_step.dependOn(tests.addAssembleAndLinkTests(b, test_filter));
-    test_step.dependOn(tests.addDebugSafetyTests(b, test_filter));
-    test_step.dependOn(tests.addParseHTests(b, test_filter));
+    cleanup.step.dependOn(tests.addPkgTests(b, test_filter,
+        "std/index.zig", "std", "Run the standard library tests"));
+
+    cleanup.step.dependOn(tests.addCompareOutputTests(b, test_filter));
+    cleanup.step.dependOn(tests.addBuildExampleTests(b, test_filter));
+    cleanup.step.dependOn(tests.addCompileErrorTests(b, test_filter));
+    cleanup.step.dependOn(tests.addAssembleAndLinkTests(b, test_filter));
+    cleanup.step.dependOn(tests.addDebugSafetyTests(b, test_filter));
+    cleanup.step.dependOn(tests.addParseHTests(b, test_filter));
 }