fix(coverage): merge duplicate reports (#8942)

Merging multiple runs isn't quite right because we 
rely on a 0 count to signal that a block hasn't been called.

Other tools like c8 expect this to be true as-well so we 
need to do our best to merge coverage files rather 
than duplicating them.

1 files changed, 9 insertions, 7 deletions

diff --git a/cli/tests/test_run_run_coverage.out b/cli/tests/test_run_run_coverage.out
index 15ea230ef..2f18020d3 100644
--- a/cli/tests/test_run_run_coverage.out
+++ b/cli/tests/test_run_run_coverage.out
@@ -1,16 +1,15 @@
-Check [WILDCARD]/$deno$test.ts
+Check [WILDCARD]/tests/$deno$test.ts
 running 1 tests
-test spawn test ... Check [WILDCARD]/run_coverage.ts
+test spawn test ... Check [WILDCARD]/tests/run_coverage.ts
 ok ([WILDCARD])
 
 test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out ([WILDCARD])
 
 cover [WILDCARD]/tests/run_coverage.ts ... 100.000% (3/3)
 cover [WILDCARD]/tests/subdir/mod1.ts ... 35.714% (5/14)
-   2 | export function returnsHi() {
-   3 |     return "Hi";
-   4 | }
------|-----
+   5 | export function returnsFoo2() {
+   6 |     return returnsFoo();
+   7 | }
    8 | export function printHello3() {
    9 |     printHello2();
   10 | }
@@ -21,7 +20,10 @@ cover [WILDCARD]/tests/subdir/print_hello.ts ... 25.000% (1/4)
    1 | export function printHello() {
    2 |     console.log("Hello");
    3 | }
-cover [WILDCARD]/tests/subdir/subdir2/mod2.ts ... 62.500% (5/8)
+cover [WILDCARD]/tests/subdir/subdir2/mod2.ts ... 25.000% (2/8)
+   2 | export function returnsFoo() {
+   3 |     return "Foo";
+   4 | }
    5 | export function printHello2() {
    6 |     printHello();
    7 | }