testing: add support for the -test.v flag

This flag is passed automatically with the (new) -v flag for TinyGo. For
example, this prints all the test outputs:

    $ tinygo test -v crypto/md5
    === RUN   TestGolden
    --- PASS: TestGolden
    === RUN   TestGoldenMarshal
    --- PASS: TestGoldenMarshal
    === RUN   TestLarge
    --- PASS: TestLarge
    === RUN   TestBlockGeneric
    --- PASS: TestBlockGeneric
    === RUN   TestLargeHashes
    --- PASS: TestLargeHashes
    PASS
    ok  	crypto/md5	0.002s

This prints just a summary:

    $ tinygo test crypto/md5
    PASS
    ok  	crypto/md5	0.002s

(The superfluous 'PASS' message may be removed in the future).

This is especially useful when testing a large number of packages:

    $ tinygo test crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512
    PASS
    ok  	crypto/md5	0.002s
    PASS
    ok  	crypto/sha1	0.043s
    PASS
    ok  	crypto/sha256	0.002s
    PASS
    ok  	crypto/sha512	0.003s

At the moment, the -test.v flag is not supplied to binaries running in
emulation. I intend to fix this after
https://github.com/tinygo-org/tinygo/pull/2038 lands by refactoring
runPackageTest, Run, and runTestWithConfig in the main package which all
do something similar.

1 files changed, 16 insertions, 0 deletions

diff --git a/testdata/testing.txt b/testdata/testing.txt
new file mode 100644
index 000000000..816246c2e
--- /dev/null
+++ b/testdata/testing.txt
@@ -0,0 +1,16 @@
+--- FAIL: TestBar
+    log Bar
+    log g
+        h
+        i
+        
+    --- FAIL: TestBar/Bar2
+        log Bar2
+            a
+            b
+            c
+        failed
+        after failed
+    log Bar end
+FAIL
+exitcode: 1