Add isPowered()

Closes #17

CHANGELOG.md

@@ -5,6 +5,7 @@ HEAD
 ----
 
 * Add `acceleration()` getter
+* Add `isPowered()` (issue #17)
 
 3.0.2
 -----

README.md

@@ -131,6 +131,9 @@ public:
   // See StepperDriver and FourWireStepper below for details.
   void powerOff();
 
+  // Tells whether the power is on.
+  bool isPowered() const;
+
   // Sets the target speed.
   // The shaft will smoothly accelerate or decelerate to reach the
   // target speed.

extras/tests/ContinuousStepperTests/CMakeLists.txt

@@ -1,6 +1,7 @@
 add_executable(ContinuousStepperTests
   acceleration.cpp
   begin.cpp
+  isPowered.cpp
   powerOff.cpp
   powerOn.cpp
   setEnablePin.cpp
@@ -40,4 +41,4 @@ add_test(
     ContinuousStepperTests
   COMMAND
     ContinuousStepperTests
-)
+)

extras/tests/ContinuousStepperTests/isPowered.cpp

@@ -0,0 +1,58 @@
+#include <ContinuousStepper.h>
+#include <TestFixtures.hpp>
+
+TEST_CASE("ContinuousStepper<StepperDriver>::isPowered()") {
+  ContinuousStepper<StepperDriver> stepper;
+
+  GIVEN("begin(10, 11) was called") {
+    stepper.begin(10, 11);
+
+    THEN("isPowered() should return true") {
+      CHECK(stepper.isPowered() == true);
+    }
+
+    AND_GIVEN("powerOff() is called") {
+      stepper.powerOff();
+
+      THEN("isPowered() should return false") {
+        CHECK(stepper.isPowered() == false);
+      }
+
+      AND_GIVEN("powerOn() is called") {
+        stepper.powerOn();
+
+        THEN("isPowered() should return true") {
+          CHECK(stepper.isPowered() == true);
+        }
+      }
+    }
+  }
+}
+
+TEST_CASE("ContinuousStepper<FourWireStepper>::isPowered()") {
+  ContinuousStepper<FourWireStepper> stepper;
+
+  GIVEN("begin(2, 3, 4, 5) was called") {
+    stepper.begin(2, 3, 4, 5);
+
+    THEN("isPowered() should return true") {
+      CHECK(stepper.isPowered() == true);
+    }
+
+    AND_GIVEN("powerOff() is called") {
+      stepper.powerOff();
+
+      THEN("isPowered() should return false") {
+        CHECK(stepper.isPowered() == false);
+      }
+
+      AND_GIVEN("powerOn() is called") {
+        stepper.powerOn();
+
+        THEN("isPowered() should return true") {
+          CHECK(stepper.isPowered() == true);
+        }
+      }
+    }
+  }
+}

src/ContinuousStepper/ContinuousStepperImpl.hpp

@@ -38,6 +38,10 @@ class ContinuousStepperImpl : public TTicker, TickListener, public TStepper, Ste
     TTicker::setPeriod(0);
   }
 
+  bool isPowered() const {
+    return status_ != OFF;
+  }
+
   void spin(float_t speed) {
     if (targetSpeed_ == speed)
       return;