Add CI test.sh script

We now have two features that require testing in various combinations,
add a `contrib/test.sh` script to do the testing and use it in the
`Test` CI job. Add names to other steps in the job to improve clarity.

.github/workflows/rust.yml

@@ -4,7 +4,7 @@ on: [pull_request]
 name: Continuous Integration
 
 jobs:
-  test:
+  Test:
     name: Test Suite
     runs-on: ubuntu-latest
     strategy:
@@ -14,20 +14,17 @@ jobs:
           - stable
           - nightly
     steps:
+      - name: Checkout Crate
       - uses: actions/checkout@v2
+      - name: Checkout Toolchain
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: ${{ matrix.rust }}
           override: true
-      - uses: actions-rs/cargo@v1
-        with:
-          command: test
-          args: --verbose --no-default-features --features strict alloc
-      - uses: actions-rs/cargo@v1
-        with:
-          command: test
-          args: --verbose --no-default-features --features strict std
+      - name: Run Test Script
+        env: ${{ matrix.rust }}
+        run: ./contrib/test.sh
 
   fmt:
     name: Rustfmt

contrib/test.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+#
+# CI test script for rust-bech32.
+#
+# The "strict" feature is used to configure cargo to deny all warnings, always use it in test runs.
+
+set -ex
+
+# Sanity, check tools exist.
+cargo --version
+rustc --version
+
+# Sanity, first check with default features.
+
+cargo build
+cargo test
+
+# Sanity, build with no features.
+
+cargo build --no-default-features --features="strict"
+
+# Check "alloc" feature alone.
+
+cargo build --no-default-features --features="strict std"
+cargo test --no-default-features --features="strict std"
+
+# Check "std" feature (implies "alloc").
+
+cargo build --no-default-features --features="strict alloc"
+cargo test --no-default-features --features="strict alloc"
+
+exit 0