From 19faa4f37469775a19f6f3887ddc06de1c1d8e14 Mon Sep 17 00:00:00 2001
From: Akshay Nandwana <akshaynandwana001@gmail.com>
Date: Mon, 19 Oct 2020 14:11:44 +0530
Subject: [PATCH] Fix #2019: Introduce InteractionObjectBuilder  (#2020)

* introduce interaction object helper class

* nit change

* format fix
---
 .../classify/InteractionObjectTestBuilder.kt  | 91 +++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 domain/src/test/java/org/oppia/android/domain/classify/InteractionObjectTestBuilder.kt

diff --git a/domain/src/test/java/org/oppia/android/domain/classify/InteractionObjectTestBuilder.kt b/domain/src/test/java/org/oppia/android/domain/classify/InteractionObjectTestBuilder.kt
new file mode 100644
index 00000000000..6e0ad14f952
--- /dev/null
+++ b/domain/src/test/java/org/oppia/android/domain/classify/InteractionObjectTestBuilder.kt
@@ -0,0 +1,91 @@
+package org.oppia.android.domain.classify
+
+import org.oppia.android.app.model.Fraction
+import org.oppia.android.app.model.InteractionObject
+import org.oppia.android.app.model.ListOfSetsOfHtmlStrings
+import org.oppia.android.app.model.StringList
+import javax.inject.Inject
+
+/**
+ * Helper class for test cases which can provide the [InteractionObject]
+ * of a particular ObjectTypeCase.
+ */
+class InteractionObjectTestBuilder @Inject constructor() {
+
+  fun createNonNegativeInt(value: Int): InteractionObject {
+    return InteractionObject.newBuilder().setNonNegativeInt(value).build()
+  }
+
+  fun createString(value: String): InteractionObject {
+    return InteractionObject.newBuilder().setNormalizedString(value).build()
+  }
+
+  fun createListOfSetsOfHtmlStrings(listOfStringList: List<StringList>): InteractionObject {
+    val listOfSetsOfHtmlStrings = ListOfSetsOfHtmlStrings.newBuilder()
+      .addAllSetOfHtmlStrings(
+        listOfStringList
+      )
+      .build()
+
+    return InteractionObject.newBuilder().setListOfSetsOfHtmlString(listOfSetsOfHtmlStrings).build()
+  }
+
+  fun createHtmlStringList(vararg items: String): StringList {
+    return StringList.newBuilder().addAllHtml(items.toList()).build()
+  }
+
+  fun createWholeNumber(isNegative: Boolean, value: Int): InteractionObject {
+    // Whole number fractions imply '0/1' fractional parts.
+    return InteractionObject.newBuilder().setFraction(
+      Fraction.newBuilder()
+        .setIsNegative(isNegative)
+        .setWholeNumber(value)
+        .setNumerator(0)
+        .setDenominator(1)
+        .build()
+    ).build()
+  }
+
+  fun createFraction(
+    isNegative: Boolean,
+    numerator: Int,
+    denominator: Int
+  ): InteractionObject {
+    // Fraction-only numbers imply no whole number.
+    return InteractionObject.newBuilder().setFraction(
+      Fraction.newBuilder()
+        .setIsNegative(isNegative)
+        .setNumerator(numerator)
+        .setDenominator(denominator)
+        .build()
+    ).build()
+  }
+
+  fun createMixedNumber(
+    isNegative: Boolean,
+    wholeNumber: Int,
+    numerator: Int,
+    denominator: Int
+  ): InteractionObject {
+    return InteractionObject.newBuilder().setFraction(
+      Fraction.newBuilder()
+        .setIsNegative(isNegative)
+        .setWholeNumber(wholeNumber)
+        .setNumerator(numerator)
+        .setDenominator(denominator)
+        .build()
+    ).build()
+  }
+
+  fun createSignedInt(value: Int): InteractionObject {
+    return InteractionObject.newBuilder().setSignedInt(value).build()
+  }
+
+  fun createReal(value: Double): InteractionObject {
+    return InteractionObject.newBuilder().setReal(value).build()
+  }
+
+  fun createInt(value: Int): InteractionObject {
+    return InteractionObject.newBuilder().setReal(value.toDouble()).build()
+  }
+}