[fusl] Add llvm's lit tool to third_party

third_party/lit/tests/discovery.py

+# Check the basic discovery process, including a sub-suite.
+#
+# RUN: %{lit} %{inputs}/discovery \
+# RUN:   -j 1 --debug --show-tests --show-suites \
+# RUN:   -v > %t.out 2> %t.err
+# RUN: FileCheck --check-prefix=CHECK-BASIC-OUT < %t.out %s
+# RUN: FileCheck --check-prefix=CHECK-BASIC-ERR < %t.err %s
+#
+# CHECK-BASIC-ERR: loading suite config '{{.*}}/discovery/lit.cfg'
+# CHECK-BASIC-ERR-DAG: loading suite config '{{.*}}/discovery/subsuite/lit.cfg'
+# CHECK-BASIC-ERR-DAG: loading local config '{{.*}}/discovery/subdir/lit.local.cfg'
+#
+# CHECK-BASIC-OUT: -- Test Suites --
+# CHECK-BASIC-OUT:   sub-suite - 2 tests
+# CHECK-BASIC-OUT:     Source Root: {{.*/discovery/subsuite$}}
+# CHECK-BASIC-OUT:     Exec Root  : {{.*/discovery/subsuite$}}
+# CHECK-BASIC-OUT:   top-level-suite - 3 tests
+# CHECK-BASIC-OUT:     Source Root: {{.*/discovery$}}
+# CHECK-BASIC-OUT:     Exec Root  : {{.*/discovery$}}
+#
+# CHECK-BASIC-OUT: -- Available Tests --
+# CHECK-BASIC-OUT: sub-suite :: test-one
+# CHECK-BASIC-OUT: sub-suite :: test-two
+# CHECK-BASIC-OUT: top-level-suite :: subdir/test-three
+# CHECK-BASIC-OUT: top-level-suite :: test-one
+# CHECK-BASIC-OUT: top-level-suite :: test-two
+
+
+# Check discovery when exact test names are given.
+#
+# RUN: %{lit} \
+# RUN:     %{inputs}/discovery/subdir/test-three.py \
+# RUN:     %{inputs}/discovery/subsuite/test-one.txt \
+# RUN:   -j 1 --show-tests --show-suites -v > %t.out
+# RUN: FileCheck --check-prefix=CHECK-EXACT-TEST < %t.out %s
+#
+# CHECK-EXACT-TEST: -- Available Tests --
+# CHECK-EXACT-TEST: sub-suite :: test-one
+# CHECK-EXACT-TEST: top-level-suite :: subdir/test-three
+
+
+# Check discovery when using an exec path.
+#
+# RUN: %{lit} %{inputs}/exec-discovery \
+# RUN:   -j 1 --debug --show-tests --show-suites \
+# RUN:   -v > %t.out 2> %t.err
+# RUN: FileCheck --check-prefix=CHECK-ASEXEC-OUT < %t.out %s
+# RUN: FileCheck --check-prefix=CHECK-ASEXEC-ERR < %t.err %s
+#
+# CHECK-ASEXEC-ERR: loading suite config '{{.*}}/exec-discovery/lit.site.cfg'
+# CHECK-ASEXEC-ERR: load_config from '{{.*}}/discovery/lit.cfg'
+# CHECK-ASEXEC-ERR: loaded config '{{.*}}/discovery/lit.cfg'
+# CHECK-ASEXEC-ERR: loaded config '{{.*}}/exec-discovery/lit.site.cfg'
+# CHECK-ASEXEC-ERR-DAG: loading suite config '{{.*}}/discovery/subsuite/lit.cfg'
+# CHECK-ASEXEC-ERR-DAG: loading local config '{{.*}}/discovery/subdir/lit.local.cfg'
+#
+# CHECK-ASEXEC-OUT: -- Test Suites --
+# CHECK-ASEXEC-OUT:   sub-suite - 2 tests
+# CHECK-ASEXEC-OUT:     Source Root: {{.*/discovery/subsuite$}}
+# CHECK-ASEXEC-OUT:     Exec Root  : {{.*/discovery/subsuite$}}
+# CHECK-ASEXEC-OUT:   top-level-suite - 3 tests
+# CHECK-ASEXEC-OUT:     Source Root: {{.*/discovery$}}
+# CHECK-ASEXEC-OUT:     Exec Root  : {{.*/exec-discovery$}}
+#
+# CHECK-ASEXEC-OUT: -- Available Tests --
+# CHECK-ASEXEC-OUT: sub-suite :: test-one
+# CHECK-ASEXEC-OUT: sub-suite :: test-two
+# CHECK-ASEXEC-OUT: top-level-suite :: subdir/test-three
+# CHECK-ASEXEC-OUT: top-level-suite :: test-one
+# CHECK-ASEXEC-OUT: top-level-suite :: test-two
+
+# Check discovery when exact test names are given.
+#
+# FIXME: Note that using a path into a subsuite doesn't work correctly here.
+#
+# RUN: %{lit} \
+# RUN:     %{inputs}/exec-discovery/subdir/test-three.py \
+# RUN:   -j 1 --show-tests --show-suites -v > %t.out
+# RUN: FileCheck --check-prefix=CHECK-ASEXEC-EXACT-TEST < %t.out %s
+#
+# CHECK-ASEXEC-EXACT-TEST: -- Available Tests --
+# CHECK-ASEXEC-EXACT-TEST: top-level-suite :: subdir/test-three
+
+
+# Check that we don't recurse infinitely when loading an site specific test
+# suite located inside the test source root.
+#
+# RUN: %{lit} \
+# RUN:     %{inputs}/exec-discovery-in-tree/obj/ \
+# RUN:   -j 1 --show-tests --show-suites -v > %t.out
+# RUN: FileCheck --check-prefix=CHECK-ASEXEC-INTREE < %t.out %s
+#
+#      CHECK-ASEXEC-INTREE:   exec-discovery-in-tree-suite - 1 tests
+# CHECK-ASEXEC-INTREE-NEXT:     Source Root: {{.*/exec-discovery-in-tree$}}
+# CHECK-ASEXEC-INTREE-NEXT:     Exec Root  : {{.*/exec-discovery-in-tree/obj$}}
+# CHECK-ASEXEC-INTREE-NEXT: -- Available Tests --
+# CHECK-ASEXEC-INTREE-NEXT: exec-discovery-in-tree-suite :: test-one