/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc=new Scanner(System.in);
		int t=sc.nextInt();
		while(t-->0)
		{
			int n=sc.nextInt();
			int a[]=new int[n];
			for(int i=0;i<n;i++)
			a[i]=sc.nextInt();
			int count=0;
			int ans=1;
			int prev=a[0];
			for(int i=1;i<n;i++)
			{
 
				int diff=a[i]-prev;
				// count++;
				if(diff>1)
				{
					ans++;
					prev=a[i];
 
					// count++
				}
 
 
 
			}
 
			System.out.println(ans);
		}
	}
}

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Ngo2CjEgMiAzIDQgNSA2CjMKMSAyIDMKNAoxIDIgMiA0CjEKMgozCjEgNCA4CjIKMSAxCg==

6
6
1 2 3 4 5 6
3
1 2 3
4
1 2 2 4
1
2
3
1 4 8
2
1 1