cargo-insta: allow multiple --exclude flags (#520)

Fixes #519

CHANGELOG.md

@@ -12,6 +12,8 @@ All notable changes to insta and cargo-insta are documented here.
 
 - Mark `require-full-match` as experimental, given some corner-cases are currently difficult to manage.  #497
 
+- `cargo insta test` now accepts multiple `--exclude` flags.  #520
+
 ## 1.39.0
 
 - Fixed a bug in `require_full_match`.  #485

cargo-insta/src/cli.rs

@@ -137,7 +137,7 @@ struct TestCommand {
     package: Vec<String>,
     /// Exclude packages from the test
     #[structopt(long, value_name = "SPEC")]
-    exclude: Option<String>,
+    exclude: Vec<String>,
     /// Disable force-passing of snapshot tests
     #[structopt(long)]
     no_force_pass: bool,
@@ -866,7 +866,7 @@ fn prepare_test_runner<'snapshot_ref>(
         proc.arg("--package");
         proc.arg(pkg);
     }
-    if let Some(ref spec) = cmd.exclude {
+    for spec in &cmd.exclude {
         proc.arg("--exclude");
         proc.arg(spec);
     }