pinky: improve tests

Author: jtracey

.github/workflows/CICD.yml

@@ -600,17 +600,6 @@ jobs:
           *-pc-windows-msvc) STRIP="" ;;
         esac;
         outputs STRIP
-    - name: Install/setup prerequisites
-      shell: bash
-      run: |
-        ## Install/setup prerequisites
-        case '${{ matrix.job.target }}' in
-          arm-unknown-linux-gnueabihf) sudo apt-get -y update ; sudo apt-get -y install gcc-arm-linux-gnueabihf ;;
-          aarch64-unknown-linux-gnu) sudo apt-get -y update ; sudo apt-get -y install gcc-aarch64-linux-gnu ;;
-        esac
-        case '${{ matrix.job.os }}' in
-          macos-latest) brew install coreutils ;; # needed for testing
-        esac
     - name: Create all needed build/work directories
       shell: bash
       run: |
@@ -629,6 +618,21 @@ jobs:
         case '${{ matrix.job.os }}' in
           macos-latest) brew install coreutils ;; # needed for testing
         esac
+        case '${{ matrix.job.os }}' in
+          ubuntu-*)
+            # pinky is a tool to show logged-in users from utmp, and gecos fields from /etc/passwd.
+            # In GitHub Action *nix VMs, no accounts log in, even the "runner" account that runs the commands. The account also has empty gecos fields.
+            # To work around this for pinky tests, we create a fake login entry for the GH runner account...
+            FAKE_UTMP='[7] [999999] [tty2] [runner] [tty2] [] [0.0.0.0] [2022-02-22T22:22:22,222222+00:00]'
+            # ... by dumping the login records, adding our fake line, then reverse dumping ...
+            (utmpdump /var/run/utmp ; echo $FAKE_UTMP) | sudo utmpdump -r -o /var/run/utmp
+            # ... and add a full name to each account with a gecos field but no full name.
+            sudo sed -i 's/:,/:runner name,/' /etc/passwd
+            # We also create a couple optional files pinky looks for
+            touch /home/runner/.project
+            echo "foo" > /home/runner/.plan
+            ;;
+        esac
     - name: rust toolchain ~ install
       uses: actions-rs/toolchain@v1
       # env:
@@ -899,6 +903,21 @@ jobs:
         case '${{ matrix.job.os }}' in
           macos-latest) brew install coreutils ;; # needed for testing
         esac
+        case '${{ matrix.job.os }}' in
+          ubuntu-latest)
+            # pinky is a tool to show logged-in users from utmp, and gecos fields from /etc/passwd.
+            # In GitHub Action *nix VMs, no accounts log in, even the "runner" account that runs the commands. The account also has empty gecos fields.
+            # To work around this for pinky tests, we create a fake login entry for the GH runner account...
+            FAKE_UTMP='[7] [999999] [tty2] [runner] [tty2] [] [0.0.0.0] [2022-02-22T22:22:22,222222+00:00]'
+            # ... by dumping the login records, adding our fake line, then reverse dumping ...
+            (utmpdump /var/run/utmp ; echo $FAKE_UTMP) | sudo utmpdump -r -o /var/run/utmp
+            # ... and add a full name to each account with a gecos field but no full name.
+            sudo sed -i 's/:,/:runner name,/' /etc/passwd
+            # We also create a couple optional files pinky looks for
+            touch /home/runner/.project
+            echo "foo" > /home/runner/.plan
+            ;;
+        esac
     - name: rust toolchain ~ install
       uses: actions-rs/toolchain@v1
       with:

tests/by-util/test_pinky.rs

@@ -44,7 +44,10 @@ fn test_long_format() {
 #[cfg(unix)]
 #[test]
 fn test_long_format_multiple_users() {
-    let args = ["-l", "root", "root", "root"];
+    // multiple instances of one account we know exists,
+    // the account of the GH runner,
+    // and an account that (probably) doesn't exist
+    let args = ["-l", "root", "root", "root", "runner", "no_such_user"];
     let ts = TestScenario::new(util_name!());
     let expect = unwrap_or_return!(expected_result(&ts, &args));