Improved task 278.

Author: Zlays

src/main/java/g0201_0300/s0278_first_bad_version/Solution.java

@@ -7,6 +7,10 @@
 boolean isBadVersion(int version); */
 
 public class Solution extends VersionControl {
+    public Solution(int bad) {
+        super(bad);
+    }
+
     public int firstBadVersion(int n) {
         int start = 1;
         int end = n;

src/main/java/g0201_0300/s0278_first_bad_version/VersionControl.java

@@ -7,7 +7,13 @@
 boolean isBadVersion(int version); */
 
 public class VersionControl {
+    private int bad;
+
+    public VersionControl(int bad) {
+        this.bad = bad;
+    }
+
     public boolean isBadVersion(int version) {
-        return version % 2 == 0;
+        return version >= bad;
     }
 }

src/test/java/g0201_0300/s0278_first_bad_version/SolutionTest.java

@@ -8,11 +8,20 @@
 class SolutionTest {
     @Test
     void firstBadVersion() {
-        assertThat(new Solution().firstBadVersion(5), equalTo(4));
+        assertThat(new Solution(4).firstBadVersion(5), equalTo(4));
     }
 
     @Test
     void firstBadVersion2() {
-        assertThat(new Solution().firstBadVersion(1), equalTo(1));
+        assertThat(new Solution(1).firstBadVersion(1), equalTo(1));
+    }
+
+    @Test
+    void firstBadVersion3() {
+        assertThat(new Solution(98).firstBadVersion(99), equalTo(98));
+    }
+
+    void firstBadVersion4() {
+        assertThat(new Solution(32).firstBadVersion(99), equalTo(98));
     }
 }