Add ReDo Pharo excercises

3 files changed, 116 insertions, 0 deletions

diff --git a/pharo-mooc/redo/src/MyCounter/Counter.class.st b/pharo-mooc/redo/src/MyCounter/Counter.class.st
new file mode 100644
index 0000000..2d65fa1
--- /dev/null
+++ b/pharo-mooc/redo/src/MyCounter/Counter.class.st
@@ -0,0 +1,60 @@
+"
+Counter is a simple concrete class which supports incrementing and
+decrementing a counter.
+
+Its API is
+- decrement, increment
+- count
+Its creation API is message startingAt:
+"
+Class {
+	#name : #Counter,
+	#superclass : #Object,
+	#instVars : [
+		'count'
+	],
+	#category : #MyCounter
+}
+
+{ #category : #accessing }
+Counter class >> startingAt: anInteger [
+	^ self new count: anInteger
+]
+
+{ #category : #accessing }
+Counter >> count [
+
+	^ count
+]
+
+{ #category : #accessing }
+Counter >> count: anInteger [
+
+	count := anInteger
+]
+
+{ #category : #operation }
+Counter >> decrement [
+
+	count := count - 1
+]
+
+{ #category : #operation }
+Counter >> increment [
+
+	count := count + 1
+]
+
+{ #category : #initialization }
+Counter >> initialize [
+   super initialize.
+	count := 0
+]
+
+{ #category : #accessing }
+Counter >> printOn: aStream [
+
+	super printOn: aStream. "a Counter"
+	aStream nextPutAll: ' withValue: ', count printString.
+	aStream cr
+]
diff --git a/pharo-mooc/redo/src/MyCounter/CounterTest.class.st b/pharo-mooc/redo/src/MyCounter/CounterTest.class.st
new file mode 100644
index 0000000..ba2afe5
--- /dev/null
+++ b/pharo-mooc/redo/src/MyCounter/CounterTest.class.st
@@ -0,0 +1,55 @@
+Class {
+	#name : #CounterTest,
+	#superclass : #TestCase,
+	#category : #MyCounter
+}
+
+{ #category : #tests }
+CounterTest >> testCountIsSetAndRead [
+	| c |
+	c := Counter new.
+	c count: 7.
+	self assert: c count equals: 7
+]
+
+{ #category : #tests }
+CounterTest >> testCounterWellInitialized [
+	self assert: (Counter new increment; increment; count) equals: 2
+]
+
+{ #category : #tests }
+CounterTest >> testDecrement [
+	| c |
+	c := Counter new.
+	c count: 2.
+	c decrement; decrement.
+	self assert: c count equals: 0
+]
+
+{ #category : #tests }
+CounterTest >> testIncrement [
+	| c |
+	c := Counter new.
+	c count: 2.
+	c increment; increment.
+	self assert: c count equals: 4
+]
+
+{ #category : #tests }
+CounterTest >> testInizialize [
+	self assert: Counter new count equals: 0
+]
+
+{ #category : #tests }
+CounterTest >> testStartingAt5 [
+	| c |
+	c := Counter startingAt: 5.
+	self assert: c count equals: 5
+]
+
+{ #category : #tests }
+CounterTest >> testStartingAt5Increment [
+	| c |
+	c := Counter startingAt: 5.
+	self assert: (c increment; count) equals: 6
+]
diff --git a/pharo-mooc/redo/src/MyCounter/package.st b/pharo-mooc/redo/src/MyCounter/package.st
new file mode 100644
index 0000000..242e6c9
--- /dev/null
+++ b/pharo-mooc/redo/src/MyCounter/package.st
@@ -0,0 +1 @@
+Package { #name : #MyCounter }