Ensure we prepare new commands for rerun

As we are now checking equality of consecutive runs, ensure we have
prepared mocks for them in the test metrics.
We can't reuse the same Cmd twice in a row.

internal/metrics/metrics_test.go

@@ -157,6 +157,24 @@ func TestRunCollectTwice(t *testing.T) {
 				metrics.WithArchitectureCommand(cmdArchitecture),
 				metrics.WithMapForEnv(tc.env))
 			b1, err1 := m.Collect()
+
+			cmdGPU, cancel = newMockShortCmd(t, "lspci", "-n", tc.caseGPU)
+			defer cancel()
+			cmdCPU, cancel = newMockShortCmd(t, "lscpu", "-J", tc.caseCPU)
+			defer cancel()
+			cmdScreen, cancel = newMockShortCmd(t, "xrandr", tc.caseScreen)
+			defer cancel()
+			cmdPartition, cancel = newMockShortCmd(t, "df", tc.casePartition)
+			defer cancel()
+			cmdArchitecture, cancel = newMockShortCmd(t, "dpkg", "--print-architecture", tc.caseArchitecture)
+			defer cancel()
+			m = newTestMetrics(t, metrics.WithRootAt(tc.root),
+				metrics.WithGPUInfoCommand(cmdGPU),
+				metrics.WithCPUInfoCommand(cmdCPU),
+				metrics.WithScreenInfoCommand(cmdScreen),
+				metrics.WithSpaceInfoCommand(cmdPartition),
+				metrics.WithArchitectureCommand(cmdArchitecture),
+				metrics.WithMapForEnv(tc.env))
 			b2, err2 := m.Collect()
 
 			a.CheckWantedErr(err1, tc.wantErr)